Dometic roof top ac unit

Most any air cond can be repaired but unless you are an A/C
repair man or a died in the wool handy man ( DIY guy ) you are
better off to replace it and go have fun .
Paying a repair man is going to be a money losing route most
of the time if you can even find one that will work on it .
Save yourself some grief , who wants to be miles & miles from
home and no A/C ? Not me

Ray

Just had my unit up front replaced. Tech said they don't have a port to add freon and that braising/soldering in a port requires torch within inches of foam insulation. He said he wouldn't take the risk of fire for any amount of money. It took him less than an hour to replace unit and I found several a dealers within a hundred miles (and I am in the middle of RV nowhere land -- only one dealer within 50 miles and most are 70-80 in opposite directions)

HERE is my attempt at fixing them.

BUB1988 wrote:
The cost of repairing could be as expensive as replacing with a new one. We replaced both roof A/C's with 15K units for $1200 including new thermostats.

Two 15k units and thermostats installed for $1,200.00
That’s the deal of the century.

One motor I had was squealing and I sprayed some wd40 or similar on the motor bearings. It had set for a while and this got it going. Another time on another AC the motor wouldn’t spin. Had an AC guy look at it and he replaced some bushings on the motor mounts. They had let the motor settle down and it wouldn’t spin. If I remember correctly the bushings were about $10. Plus the service call of course. If you could get the fan to run long enough you could tell if it is getting cold, especially with top cover off you could see if lines are getting cold or not

Well I cleaned the condenser last weekend and used it this past weekend and now the motor is seizing up. I can replace motor pretty easy but don’t know if that was my problem all along or if I still have a Freon issue

My rear AC quit blowing cold about 7-8 years ago. I called a mobile tech who checked it and said the Freon leaked out. I had him put a port on it. He charged me about $5 for the part and the service call. I put a little pressure in and found the leak. A hole was rubbed through a line. My buddy brazed it up. I pressure checked it again, pulled vacuum and charged. Worked great for a few years. Quit again but couldn’t find a leak this time. I bought a can of stop leak for R-22 and put it in, after pulling vacuum, and recharged again. Knock on wood it has been working since. Been about 5-6 years now.

Not saying this will work for every problem but I spent a little time and a few dollars and so far so good. My front a/c is on the third unit. First one lost Freon about a year after I bought it. Was replaced under warranty. Lasted about a year and it leaked out. I replaced that one so when my rear unit went out, I just figured I would try to fix it and see if it would work.

Junk it and buy new, you won't regret it. Installation is easy.

The cost of repairing could be as expensive as replacing with a new one. We replaced both roof A/C's with 15K units for $1200 including new thermostats.

Another thought is to make sure that your freeze-control thermistor is in place and working properly. If not, the unit's coils will freeze up and it will not cool or move air until it defrosts. My front 15K unit started freezing up and not blowing cold air. Turns out, after removing the cover up top, the thermistor had fallen off the coil tube and allowed the coils to freeze up.